Home / 5,321.14-7,349.62-3,902.78

Finding the Fourth Proportional to 5,321.14, 7,349.62 and 3,902.78

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Solution

The fourth proportional to 5,321.14, 7,349.62 and 3,902.78 is: 5,390.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.14 : 7,349.62 = 3,902.78 : x
  2. Step 2: Convert to fraction form
    5,321.14/7,349.62 = 3,902.78/x
  3. Step 3: Cross multiply
    5,321.14x = 7,349.62 × 3,902.78
  4. Step 4: Simplify right side
    5,321.14x = 28,683,949.94
  5. Step 5: Solve for x
    x = 28,683,949.94/5,321.14
  6. Step 6: Final answer
    x = 5,390.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.